PRELUDE MTS SUBWOOFER - Diagramas dediagramas.diagramasde.com/audio/Infinity PreludeMTSs… · · 2012-05-01PRELUDE MTS SUBWOOFER SERVICE MANUAL ... Prelude MTS Subwoofer. 24. OPAMP,

PRELUDE MTS

SUBWOOFER

SERVICE MANUAL

Infinity Systems, Inc

250 Crossways Park Dr.

Woodbury, New York 11797 REV 6 6/2007

Prelude MTS

CONTENTS

SPECIFICATIONS …….……………….…………….………………….3

DETAILED SPECIFICATIONS ……………………..…………………4

CONTROLS & CONNECTIONS ………………………………………6

OPERATION/AMPLIFIER REMOVAL……… ..……..…..…….…….10

MECHANICAL/PACKING PARTS LIST………………..….…………11

EXPLODED VIEW ………………………………………..……………13

PACKAGING ……………………………..…………….…………….…14

PRELUDE MTS ADJUST BIAS PROCEDURE…….…..……….………15

ELECTRICAL PARTS LIST (120v)……………….….…..….…………16

INTEGRATED CIRCUIT DIAGRAMS …………….….………………24

PRINTED CIRCUIT BOARD DIAGRAMS….……….……..…………25

SCHEMATICS……………….…..……….……….….…………………29

2

Prelude MTS Subwoofer

3

Prelude MTS Subwoofer Specifications


4

Detailed Specifications


5

Detailed Specifications (Cont.)


6


7


8


9


10

Operation

Amplifier Removal

Mechanical & Packaging Parts List1 Cabinet Prelude MTS Subwoofer (Not for Sale)

2 Low Frequency Transducer

(Woofer)

12” Cast frame C.M.M.D., Shielded

DC Resistance 7.6 ohms �10%335036-001

3 Complete Subwoofer Amp assembly Not For Sale

4 Woofer Grille retainers (4) 66815-01

5 Woofer gasket 335481-001

6 Woofer Grille 335037-001

7 Cosmetic Cap Logo 335351-001

8 Woofer Trim Ring 335040-001

9 Front Foot 335038-001

10 Rear Foot 335244-001

11 Terminal Connector Plate 335379-001

12 Cosmetic Cap 335256-001

13 Cosmetic Cap Gasket 335360-001

14 Cosmetic Cap Grille retainers (3) 333249-001

15 Binding Post, BLK, Tower Conn. 335358-001

16 Binding Post, RED, Tower Conn. 335358-002

17 Binding Post, BLK, Rear Panel JC0151

18 Binding Post, RED, Rear panel JC0150

19 Subwoofer Outer Carton 335059-00120 Subwoofer Top End Pad 335058-001

21 Subwoofer Bottom End Pad 335058-002

22 System Owner’s manual 335060-005

23 Warranty Card 335841-001

24 Survey Card 335868-002

25 Power Cord WI0043

26 Double-ended Banana Plug 335357-001

27 Hardware Kit 335849-001

28 Alignment Pins (2) 335348-001

29 Spike foot set 331360-001

30 T-Handle Allen Key 335851-001

31 RABOS Complete kit 335852-001

32 RABOS Test CD 335855-001

33 RABOS Sound Level Meter 335368-001

34 RABOS Key (Screwdriver) 091-00121-000

35 RABOS Q-Finder 335856-001

36 RABOS Pouch 335853-001

9 Volt Battery


Mechanical & Packaging Parts List (Cont’d)

38 Connector Plate 335249-001

39 Connector Plate Gasket 335355-002

S1 Screw (4) PPH #10-32 x 1 BLK 900401-016

S2 Screw (4) PPH #10-32 x .75 BLK 900401-012

S3 Screw (8) PB FPH #10 x .625 BLK 908401-010



S6 Screw (2) MS PPH #10-32 x .625 BLK 900401-010

S7 Screw (7) PPH #8 x .75 BLK 900101-012

12



14

Packaging

PRELUDE MTS ADJUST BIAS PROCEDURE(Mandatory when any output MOSFET transistors Q305,310,320,321,306,307,311,312 are replaced)

1. Amplifier should be unplugged and OFF.

2. Remove Amp assembly from cabinet, following the instructions on Page 10.

3. Identify the Linear board assembly (PCB with the output transistors)

4. Adjust RP301 and RP302 fully Counter Clockwise. See diagram below.

5. Apply 120 VAC power to unit; turn power switch ON.

6. Verify LED illuminates on the front gain control dial, unless you have disconnected the plug.

7. Connect voltmeter set to DC millivolt range to twin pins on terminal J303, on Linear board.

8. Verify initial voltage is less then 0.1 mV.

9. Adjust RP301 Clockwise until voltmeter reads 0.3 mV + the initial current from step #8.

10. Adjust RP302 Clockwise until voltmeter now reads 0.6 mV + the initial current from step #8.

11. Turn amplifier OFF. Disconnect AC power to unit.

12. Remove voltmeter from terminal J303.

13. Replace amp assembly back into cabinet.


16

Prelude Amp Assembly Parts ListPart# Description Qty Designator


17

Prelude Amp Assembly Parts List (Cont.)Part# Description Qty Designator


18



19



21



22

Prelude Amp Assembly Parts List (Cont.)

Part# Description Qty Designator

JRico

630049 PCB, INPUT

JRico


23



24

OPAMP, QUAD 14P DIL TL074/084, LM324N COMPARATOR U102, U103, U201, U202, U203, U301, U306

OUTPUT C

V+ V-

OUTPUT B

-INPUT A -INPUT D

-INPUT B -INPUT C

+INPUT A +INPUT D

+INPUT B +INPUT C

OUTPUT A OUTPUT D14

11

1

4

13

10

2

5

12

9

3

6

87

A

B C

D

OPAMP, DUAL 8PIN DIL TL082U101

0009

5

2Base

3 Collector

1 Emitter123

TRANS, NPN 150V 0.6A 2N5551, 2N4401,Q303, Q308, Q322, Q323,Q204,

Q314, Q315, Q317,Q501

2Base

3 Collector

1 Emitter123

TRANS, PNP 150V 0.6A 2N5401,Q302,Q304, Q309, Q313, Q316, Q324, Q401

-5V TO220 LM7905CTREGULATORU303, 502

2

1 6

5

4

FOTO, 6PIN MOC3012U304

1 2 3

IRFZ40, Q403, Q404, Q406, Q407MOSFET, IRF640/9640, T0220ABQ305, Q310, Q320, Q321, Q306,Q307, Q311, Q312

PWM, 8PIN DIL UC3842NU307

5.0V

Osc

PWM

UNDER VOLTAGELOCKOUT

OUTPUT

CURRENT SENSE

GND5

Vcc8

4

2

1

7

6

3

R

R

1

2

3

4

8

7

6

5

A- +

B OUTPUT

A OUTPUT

B -INPUT

A -INPUT

B +INPUT

A +INPUT

V-

V+

B-+

FOTO, 6PIN 4N35U104

1

2

3

6

5

4

TRANS, NPN 250V 1A T0220 TIP47C Q319

+5V TO220 LM7805CTREGULATORU302, 501

1. GROUND2. INPUT3. OUTPUT

1. INPUT2. GROUND3. OUTPUT

JFET, Q201, Q202,Q205, Q301, Q101

123

1. G2. D3. S

1. D2. S3. G

3

Integrated Circuit Diagrams


25

EMI PCB (AC Filter)

Input PCB


26

Linear/Buck PCB


27

Feature PCB


28

Power Supply PCB

29

30

31

32

33

34

35

36

PRELUDE MTS SUBWOOFER - Diagramas dediagramas.diagramasde.com/audio/Infinity PreludeMTSs… · · 2012-05-01PRELUDE MTS SUBWOOFER SERVICE MANUAL ... Prelude MTS Subwoofer. 24. OPAMP,

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